Lexus 2013 IS250C Owner's Manual page 157

If does not come on even after shifting the shift lever to S
■
This may indicate a malfunction in the automatic transmission system. Have the
vehicle inspected by your Lexus dealer immediately.
(In this situation, the vehicle will operate as if the shift lever is in D.)
AI-SHIFT
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The AI-SHIFT automatically shifts the gear to the suitable position according to the
driver performance and driving conditions.
The AI-SHIFT automatically operates when the shift lever is in the D position. How-
ever, operating the "-" shift paddle switch will restrict the function' s operation. (Shift-
ing the shift lever to the S position cancels the function.)
CAUTION
When driving on slippery road surfaces
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Be careful of downshifting and sudden acceleration, as this could result in the vehi-
cle skidding to the side or spinning.
2-1. Driving procedures
2
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